Comments from my account that I didn’t make?

Hi, not sure if this is the right sub to post this, but I was just going through my comment history and noticed a comment from a few weeks ago that I DEFINITELY did not make. I literally have never even used the emoji’s in the comment and do not type like this at all. The interesting part is that most of the comments under the video were people hating on the post/creator, but mind was defending it. It was a really popular video (6m views and creator has about 30k followers). Obviously gonna change my password but has this happened to anyone else? Is it maybe someone buying comments or something?